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Photocatalytic decolorization of methyl orange dye using nano-photocatalysts

机译：纳米光催化剂对甲基橙染料的光催化脱色

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Environmental contamination, which is growing around the world, is a serious problem can not to be neglected. Among all contaminations, water pollution is a major problem. Azo dyes are one of the largest groups of pollutants found in the drinking water, coming from, and the food and textile industries. TiO2/Fe3O4 and TiO2/Fe2O3 nanocomposites with various ratios were synthesized by an ultrasonic-assisted deposition-precipitation method and their UV-light decolorization of methyl orange (MO) dye was investigated. The effect of Fe3O4/TiO2 and Fe2O3-TiO2 nanocomposites ratio on the photocatalytic activity and magnetic property of the nanocomposites was studied by comparing their decolorization curves and magnetism in the presence of magnet, respectively. The results revealed that the decolorization efficiency of 1 wt% Fe3O4/TiO2 nanocomposite reached about 40% within 60 min UV irradiation at room temperature. However, this sample showed the least magnetism. Also, the ability of synthesized nanocomposites in holding the adsorbed methyl orange dye on their surface and the effect of pH were investigated.
机译：在世界范围内日益严重的环境污染是一个不容忽视的严重问题。在所有污染中，水污染是一个主要问题。偶氮染料是在饮用水，食品和纺织工业中发现的最大污染物组之一。通过超声辅助沉积沉淀法合成了不同比例的TiO2 / Fe3O4和TiO2 / Fe2O3纳米复合材料，研究了甲基橙（MO）染料的紫外光脱色作用。比较了Fe3O4 / TiO2和Fe2O3-TiO2纳米复合材料比例对纳米复合材料光催化活性和磁性的影响，分别比较了它们在磁体存在下的脱色曲线和磁性。结果表明，在室温下60分钟内，1 wt％Fe3O4 / TiO2纳米复合材料的脱色效率达到40％左右。然而，该样品显示出最小的磁性。此外，还研究了合成的纳米复合材料在表面吸附甲基甲基染料的能力以及pH值的影响。

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